Feed-roller mechanism.



E1 PEDERQUlST. FEED ROLLER MECHANISM.

APPLICATION FILED MAY 24, 1913.

Patented May 19, 1914.

M2 3 1 1 111 0; 1 gz/filbfozm I UNITED srn'rns PATENT FFICE.

ERNEST PEDERQUIST, OF NEWARK, NEW JERSEY, ASSIGN OR. TO MEISSELBACH-CATUCCI DIANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

Specification of Letters Eatent.

Patented May 19, 1914:.

Original application filed November 26, 1912, Serial No. 733,588.Divided and this application filed. may

' 24, 1913. Serial No. 769,557.

To (lllwlwm it may concern:

. Be it known that I, ERNEST PEDERQUIST, a citizen of. the UnitedStates, residing in the city of Newark, county of Essex, and State ofNew Jersey, have invented certain new and useful Improvements inFeed-Roller Mechanism, of which the following is a specification.

In the patent to Pliny Oatucci, No. 97 8,113; dated December 6, 1910, isshown a bobbing gear cutter, which in practice has proven to be verysuccessful in cutting gears and pinions and my invention is in thenature of an attachment to the machine of the patent, whereby I amenabled to produce pinion rods of any length, such length being limitedonly by the length of the blank rod upon which the teeth are to be out.

The improvement therefore, has for its object the provision of means forcontinuously feeding a blank pinion rod to a hob cutter giving said rodnot only a travel in the direction of its axis but also a rotary motion,so that the hobbing cutter may simultaneously and continuously out allof the teeth in the rod.

In the accompanying. drawings which illustrate my invention: Figure 1 isa sectional view substantially through the axis of the pinion rod. Fig.2 is a front view of the feeding device. Fig. 3 is a side elevation ofthe same showing the gear plan. Fig. i is a rear view showing thedriving plan. Fig. 5 illustrates a modified form of yield ingbearing forone of the feed rollers. Fig. 6, illustrates a pair of rollers forsmaller rods r In the drawings and specification similar referencenumerals are used to designate like parts throughout.

1 will now proceed to describe my improved feeding device.

It consists of the hollow cylindrical shank 10, by which it is held inthe chuck of a hob gear cutting: machine, for example like that shown inCat-uccis patent above mentioned. It has the conical part 11, forroperly centerinp; in in the chuck. This conical portion is alsoflattened at 12, for the purpose of affording a wrench or vise hold inorder that the shank may be firmly screwed into the supporting block 13,as shown in F 1.

T he shank 10 is further provided with a i l l l duced cylindricalbearing 14, upon which the gear 15 is mounted. The gear 15 is pro yidedwith an elongated hub 16, into which is securely fixed the pin 17, overwhich the arm 18 extends, said arm being rigidly secured to some fixedpart or the machine, as for example, the headstock. This arrangementpermits the shank 10 to rotate freely within the gear 15 and its hub 16,while the latter is held from rotating by means (ifthe rigid arm 18.

The supporting block 13 is generally rectangular in shape, and, as aboveindicated, is

firmly screwed upon the end of the shunklO as shown. It is provided withthe slot 19, cut into its front face to receive the two feed rollers 20,21, which are mounted upon the cross sha ts 29. and 23, extendingthrough the side wa s of the block 13. Upon the end o1 the shaft 22,-is' mounted the wormwhcel 24, which engages the worm 25, the lattermounted in bearings 26--26, upon the side of the block 18. Upon the rearprojecting end of the worm :25, is rigidly secured the gear 2?, meshingwith the pinion 28, which latter is secured to the gear 23 in positionfor engagement with the gear 15 upon the shank 10. The arrangement ofthe train of gears just described is such that the relative rotation ofthe gear; 15, with re" spect to the shank 10 and the block 13, willproduce a positive rotation of the feed roller 20; or what amounts tothe same thing, when the shank 10 and block 13 are rotated, while thegear 15 is held against rotation by the arm 18, a positive rotation ofthe feed roller 20, and the consequent advance of the rod 7 take place.

The bearings 30 for the shaft- .23, are lo cated in'open slots 31 in theblock 13. The

cross bars 82 are rigidly secured to the block J13 across said slots 31by means of screws 33, and in said cross bars 32 are rigidly secured thespring barrels 3 1*, within. which are located the coil springs 35 whichbear upon the bearings 30 soas to aliord astrong but yielding pressureupon the shaft 23, and through said shaft upon the feed roller 21. Thespring 35 may be adjusted by means of the small headed screws 36, whichare threaded into the outer ends of the barrels as will be readilyunderstood. I find that I may dispense with the spring barrels in somecases and substitute therefor a block of wood 37, locating the samebetween the bearings 30, and the cross bars 32, as shown in Fig. 5. Theblocks of wood are sulficiently yielding to afford the necessarypressure upon the shaft 23 to cause the feed roller 21 to bite into therod 7. As shown in Fig. 2, the two feed rollers 20 and 21 are knurled,the roller 21 being knurled across its circumferenaa so as to bite intothe rod 7, andsince the roller 20 is a live roller, it produces alongitudinal feed of the rod 7. The roller 21 is not only cross knurledbut is circumferentially grooved as shown, 56 that there will be notendenc in the rod 7 to accidentally twist as it isfed a inst thehbb-cutter of the machine upon which it may be used.

I regard the above described knurli of the two rollers 20 and 21 asimportant tures of my improvement, inasmuch as the live roller 20produces the longitudinal feeding of the rod while the circumferentiallygrooved roller 21 events the accidental twisting of the re between theroll- 'ers, and yet permits the said rod to advance upon the cutter onthe machine, with a sort 0 screw motion which is necessary to the propercutting of the teeth in the rod.

By the mechanism above described I am enabled to cut pinion rods of anylength as it is only necessary to set the parts in position and startthe cutting action. So ong as power is ap ii to the machine the cuttingwill take p ace ntil the end of the rod is reached. e-

As above described, pinion rods have become a staple article in themarket-And users of such rods cut them into various thicknesses forvarious uses in the mechanic site; but hitherto, solar as I am aware,the lengths of suchrods have been limited to fromfiintolfoot,thisofcoursebein'g due to e capacities of the machines desi edthe cutt' of such rods.

ile'I have descrl the feed rollers for use in eonnectibn with pinion rodcutting, both in the pment a plication and in the application from wthis application has been divided, yet I do not desire to confine theuse of the feed rollers tosuch work alone, for the reason thatfeedrollers thus mounted are capable ofuse in meapy other relationswhere it is desired to f cylindrical rode accurately either directlywithout rotation upon the axis of such rods or to feed them with acombined forward and rotative movement. Many other uses of the feedrollers constructed, the one with cross knurling and the other withcircumferential grooves will occur to those skilled in mechanic arts. Itherefore do not desire to confine the feed rollers specifically topinion rod cutting.

As a means for feeding the cylindrical rod 7, directly without rotationI may provide the following mechanism: Meshing directly with the gearwheel 15 is a'genr 38, positively driven by some mechanism of themachine upon which my improvement is mounted. In this case the headstockof the machine in which the shank 10 is rigidly held stationary whilethe arm 18 is disconnected from the pin 17. In this case the rotation ofthe gear 38 will rotate the gear 15, and consequently entire train 29,28, 27, worm 25 and worm-wheel 24, thereby carrying withit the liveroller 20. Thus the device is readily adapted for use in cutter in whichcase the rod 7 itself must be made to rotate, or by the use of thedrivmg gear 88, the rod 7 may be fed directly and without rotation to a'single milling cutter. In either case no change whatsoever is made inthe structure of the device.

In Fig. 6 I have shown a pair of my improved feod rollers 20', 21,designed for smaller rods than the'pair shown in the remaining figures.Thus by using the change various sized rods up to the capafzitay. of thedevice ma be fed through it. tively larger r than the ones shown inFigs- 1 and 2 would of course require a larger device, but this is amatter of dimension only.

This application is a division of no prior application, Ser.'No.733,588, Filed bar 26, 1912, for'feed roller mechanism for inion rodcuttmg' lanar eondination of a pair of perip mounteduponp am w eadiofsairoller-aha itspepair of tially ved feed rollera, each of said rollersits groove croknurled and one of said rollers being provided with aplurality of supplemental circumferential grooves, and means forpositively rotating one of said rollers.

4.Inapimon rodfeed mechanismthe combination of a pair of peripherally edfeed rollers, mounted upon parallel afta, each of said rollers ha itsperipheral grooves cross knurled an one of said rollers being furtherprovided with a plurality of supplemental circumferential iLlnapinioni-odfeed mam-mac,

heugfurther provided with a grooved feed rollers, mounted upon parallelaxes, one of said rollers having its groove cross knurled, and' theother rollerhaving its groove provided with a Hplurality ofsupplementalcircumferential grooves; fiked 4 bearings for one of said rollersaridryilding bearings for the other roller.

6. In a cylindrical rod feeding mechanism,

the combination of a rotating shaft, a roller rigidly secured to saidshaft a circumferential groove in said roller, said groove having itsface cross knurled, a second shaft, a roller rigidly secured to saidsecond shaft, a circumferential groove in said second roller, saidgroove having itsfiface cross .20 knurled and provided with a pluralityof supplemental circumferential grooves.

ERNEST PEDERQUIST. Witnesses:

NORMAN E. ZUsr, L. M.. SANDERS.

